Concentrator.



W. H. MILLER & G. E. KRATZER.

CONCENTRATOR.

APPLICATION FILED FEB. 3. 1915.

Patented Feb. 8, 1916.

2 SHEETS-SHEET I.

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FEED STATES PATENT I WILLIAM H. MILLER AND GUY E. KRA'IZER, or CHICO, CALIFORNIA.

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To all whom it may concern:

Be it known'that we, WILLIAM H. MILLER and GUY E. KRATZER, citizens of the United States, residing at Chico, in the county of Butte and State of California, have 'invented certain new and useful Improvements in Concentrators, of which the following is Thepresent invention relates to separating apparatus and more particularly to that type of apparatus known as concentrators, and adapted for separating the values from the tailings in ore bearing material.

The present invention has for its principal objects to provide a concentrator comprising a plurality of units which may be added to I or subtracted from to form an apparatus of the desired capacity; to provide adevice in which the separating is accomplished by a gyrating motion which advances the material in the units from the feed end thereof to the discharge end; one in which each'unit is provided with an independent feed chute through which the material is fed thereinto,

and to provide an improved intermittently operated device for permitting the material to be deposited from a hopper'into said feed I chutes.

- jects in View,

With the above mentioned and other obthe invention consists in the construction and novel combination of parts hereinafter described, illustrated in the accompanying drawing, and pointed out in the claim hereto appended; it being understood that various changes in'the form, proportion, size and minor details of construction within the scope of the claim, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

To more fully comprehend the invention, reference is directed to the accompanying drawings, disclosing the preferred form of our invention and in which- Figure 1 is a view in side elevation partly in section, disclosing theframe, the hangers and the units carried thereby, the mechanism for impartingagyratory movement to theunits and the feed mechanism. Fig. 2 is a broken top plan view disclosing more fully the arrangement of the" units. Fig. 3 is a sectional view taken on line 33 of Fig. 1,

Patented Feb. 8, 1916. Application filed February 3, 1915. Serial No. 5,817. 7 I

View of one of the units, disclosing the di-:

vision walls and advancing fingers therein. Fig. 5 is a broken end elevation of the feed end of the units, disclosing the feed chutes communicating therewith.

Referring more particularly to the drawings, wherein like characters of reference designate corresponding parts throughout the several views, the numerals 1 indicate suitable supporting beams which support the upright corner posts'2 on which are carried the top members 8, this structure constituting the frame work. Extending upwardly at spaced intervals through the top members 3 are the eye members 4:, which hingedly support the upper ends of the hangers 5, and the lower ends of opposing hangers are connected by the supporting members 6, and on said supporting members rest the platform member 7, the whole form ing a swinging platform.

A plurality of units 8, trays, are positioned in rowson said platform 7 and are arranged one above the other, as in Figs. 2, and 3, and said trays are retained in position by a clamp frame surrounding the same and comprising the transversely extending top and base members 9 which are drawn't oward each other by the connecting bolts -10 extending through the ends thereof. A cover board 8 is positioned over the topmost layer of trays to .close the open tops thereof. 1

, side edge with a plurality of inwardly extending agitator fingers 115 which are-spaced from the bottoms thereof. The body 1s prohereinafter termed i vided along its upper side edges with suitable pins or lugs 16 which project into suitable openings 17 formed in the'bottom of each body when the trays are arranged one upon the other, as-in Fig. 3.

Supported by the beams 1 beneath the trays 8 is a vertically disposed bearing 18.

recessed, as at 19, and in which is rotatably mounted a shaft 20 which operates through a bearing 21 in the upper end of the recess 19 and projects a slight distance above the bearing 18. A belt pulley 22 is secured to the upper endof the shaft 20 by the set screw 23, and carries on its upper surface a fly wheel .24, provided on its upper surface with an annular flange 25 forming a cupshaped bearing arranged eccentrically of the shaft 20. A pin 26 carried by a plate 27 secured to the underside of certain of said supporting'members projects into the cupshaped bearing, and the same is surrounded by a suitable bearing sleeve 23 of substantially the same diameter as the cup-shaped bearing. Communicating with one end of each of said trays and carried thereby in any suitable manner, is a material feed chute 29, all of which communicate at their upper ends with a common open topped trough 30, and said trough at timed intervals is adapted to register with the discharge spout 31 of a material hopper 32 mounted in the upper portion of the supporting frame.

A slide gate 33 supported at its ends beneath the discharge spout 31 by the hangers 3-4 controls the discharge of the ore into the trough 30, and said gate is pivotally con nected at intervals to the ends of arms 35 wvhich at their opposite ends surround cam surfaces 36 carried by a shaft 37 mounted in bearings 38, carried by the frame. A belt pulley 39 is carried by the shaft 37 and the same is connected by a belt 40 with a drive I pulley 41 mounted on a drive shaft 42, which recelves its power from any suitable source. A drive pulley 43 is also mounted on said shaft 42, and is connected by a belt 44: with the belt pulley 22. The tailings are discharged from the discharge end of the trays into the chute Q5 and are conveyed thereby to any suitable place of deposit.

The size of the discharge opening of the spout may be regulated within certain limits by the adjustable member 46 carried by one side edge of the spout 32 to control the cut away portion 1-7 thereof. crushed ore being deposited into the hopper and the shaft 42 being operated, the concentrator operates in the following manner to separate the values from the tailings, the values being retained in the compartments of the trays, while the tailings are caused to pass to the discharge end thereof and are conveyed to a place of deposit by the chute 45. The operation of the belt 44 causes the belt pulley 22 and fly wheel 24- to rotate, which will transmit through the eccentrically arranged bearing formed by the flange 25, a gyratory movement to the trays 8 and the supports therefor. This gyratory motion, which will be in a counter-clockwise direction, will cause the crushed ore fed into Finely the trays from the spout 31 by the intermittent movement of the slide 33 to be forced this gyratory motion the lighter particles of material or tailings will be advanced from one compartment to the other, in their move ment encountering the fingers l5, and will be finally discharged from the trays over the Walls 14 at the ends thereof into the chute 45. The values, owing to their weight, Will be retained by the walls 12 in the respective compartments and at such a time as a sufficient quantity of material has been treated, the operation of the device is stopped, the clamp frame is removed and the'pans are disassembled and the valve removedtherefrom in any suitable manner.

' The operation of the slide 33 is so timed that the same is withdrawn from under the spout 31 only at such periods as when the trougl 30 is beneath the same.

Should it be desirable, mercury could be placed in the compartments to collect and absorb the values.

It will be apparent that we have designed a concentrator in which the number of trays may be varied to regulate the capacity of material to be handled by the concentrator, one which is simple in construction and one which is thorough and efficient in its operation.

Having thus described our invention what we claim as new and desire to protect by Letters Patent is A concentrating tray formed with an open top, a solid bottom and up-turned side and end walls, the end walls terminating short of the upper edge of the side walls to provide feed and discharge openings at the opposite ends thereof, a plurality of spaced walls extending transversely of each tray and dividing the same into compartments, the upper edge of said transverse walls terminating short of the upper edge of the side walls, a plurality of agitator fingers extending from one side wall toward the center of the trays, and said fingers being spaced from the bottom of the respective trays, and means for gyrating the tray in a horizontal plane.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

WILLIAM H. MILLER. GUY E. KRATZER. lVitnesses F. C. WILLIA S, M. W. EVANS.

. Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

7 Washington, D. C. 

